Jessica Simpson‘s son celebrated his fourth birthday with a Moana-inspired party — complete with a Maui lookalike — in the family’s backyard, which was made to look like the Isle of Te Fiti, the island of the goddess featured in the Disney film.

Ace’s party featured a bounce house and games, including personalized toy sacks from My 1st Years.

The entrepreneur posed with her kids and husband Eric Johnson, 37, for a family photo alongside Moana and Maui. They wore beach-themed outfits with vibrant greens and floral designs.

The singer and businesswoman celebrated her son’s birthday with a tribute on her Instagram, featuring a video of her two kids singing “The Happy Birthday Song” in their own style of Carpool Karaoke.

“May wish #4 come true my beautiful baby boy,” she wrote on Instagram alongside a snap of her blond-haired boy surrounded by balloons and a birthday cake.

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